The incident took place last week and the accused, all residents of a locality where the girl lives, had recorded the act on a mobile phone.
On October 30, a case of rape was registered at Punjipathra police station in the district and the accused, Guddu Kumar, was arrested, said superintendent of police Santosh Singh.
The woman was admitted to Raigarh district hospital and a case of attempt to murder was registered against unidentified persons
As per the complaint, accused 27-year-old Nohar Sai befriended the survivor over phone and promised marriage despite being married.
The boy, a resident of the same village, lured the victim to a secluded place on the pretext of taking her fishing at a pond and allegedly sexually assaulted her, the official said.
According to the victim's family, she was allegedly raped on July 19 and ended her life the next day.
He was booked under IPC and Protection of Children from Sexual Offences (POCSO) Act for murder, rape and causing disappearance of evidence.
The boys were booked under sections 363 (kidnapping) and 376D (gangrape) of IPC and provisions of the Protection of Children from Sexual Offences (POCSO) Act have also been invoked.
The teacher and four other school staff members, including the headmaster, have been suspended while action has also been taken against three education department officials for negligence of duty.